How will Donald Trump take on ISIS?

Mr Trump said he would recruit NATO to invade strongholds in the Middle East to "knock the hell out of ISIS" and has regularly repeated his belief that Mrs Clinton's actions as Secretary of State allowed the terror group to grow.

Mr Trump originally promised a ban on Muslim immigration into the US in response to the San Bernadino terror attack in December 2015.

But he later refined his stance and proposed a policy of “extreme vetting” to combat any future terrorism on his watch.

Speaking at a rally in Ohio, he said: “The common thread linking the major terror attacks that have occurred on US soil – 9/11, the Boston bombing, the Orlando attack, is that they have involved immigrants or the children of immigrants.

“A new immigration policy is needed immediately. The time is overdue to develop a new screening test for the threats we face today.”

How will Hillary Clinton take on ISIS?

Getty Images

Clinton vowed to take out ISIS in its heartlands

The Democrat has laid out of three-pronged approach to defeating the terror threat of ISIS.

She said: "We need to counter each step in the process that can lead to an attack, deterring would-be terrorists and stopping plots before they’re carried out.

"To accomplish all this, we’ll need to stay ahead of the curve technologically. The tech community and governments need to see each other as allies, not adversaries, in the effort to stop terrorist networks and keep their message from spreading. "